定安县以病家口服海群生作为丝虫病低度流行区(感染率在5％以下)的预防措施,广东省丝虫病防治技术措施提到,采用全民服药措施时,对未次普查微丝蚴阳性率在0.5％以下的大队,可给历次普查发现的病例及其10岁以上家属服药。本文以二项分布数学模型分析微丝蚴血症者的家庭集聚性,以探讨病家查治的作用。 Ding’an County takes oral ginseng as a preventive measure against endemic filariasis (prevalence rate below 5%). Measures for prevention and control of filariasis in Guangdong Province are mentioned. When adopting universal medication measures, The brigade with a positive rate of less than 0.5% of silkworm lacrimas may take the cases discovered by previous censuses and their relatives over the age of 10 for treatment. In this paper, binomial distribution model was used to analyze the family aggregation of microfilaremia patients in order to explore the role of disease investigation.